PHOENIX-5860 Throw exception which region is closing or splitting whe…

…n delete data

Signed-off-by: Xinyi Yan <yanxinyi@apache.org>

phoenix-core/src/main/java/org/apache/phoenix/coprocessor/UngroupedAggregateRegionObserver.java

@@ -977,4 +977,17 @@ public InternalScanner run() throws Exception {
         }
         return s;
     }
+
+     /**
+     * roll back after split failed, will isRegionClosingOrSplitting set false,
+     * and then write region will is available
+     * @param ctx
+     * @throws IOException
+     */
+    @Override
+    public void postRollBackSplit(ObserverContext<RegionCoprocessorEnvironment> ctx) throws IOException {
+        synchronized (lock) {
+            isRegionClosingOrSplitting = false;
+        }
+    }
 }

phoenix-core/src/test/java/org/apache/phoenix/coprocessor/UngroupedAggregateRegionObserverTest.java

@@ -0,0 +1,58 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.apache.phoenix.coprocessor;
+
+import static org.junit.Assert.assertEquals;
+
+import org.apache.hadoop.conf.Configuration;
+import org.apache.hadoop.hbase.HConstants;
+import org.apache.hadoop.hbase.coprocessor.ObserverContext;
+import org.apache.hadoop.hbase.coprocessor.RegionCoprocessorEnvironment;
+import org.junit.Test;
+import org.mockito.Mockito;
+
+import java.lang.reflect.Field;
+
+/**
+ * Test UngroupedAggregateRegionObserver
+ */
+public class UngroupedAggregateRegionObserverTest {
+
+    /**
+     * Tests RollBackSplit
+     * postRollBackSplit
+     */
+    @Test
+    public void testSplitFailedRollBack() throws Exception {
+        Class<UngroupedAggregateRegionObserver> ungroupClass = (Class<UngroupedAggregateRegionObserver>) Class.forName(UngroupedAggregateRegionObserver.class.getName());
+        UngroupedAggregateRegionObserver ungroupObserver = new UngroupedAggregateRegionObserver();
+        ObserverContext context = Mockito.mock(ObserverContext.class);
+        RegionCoprocessorEnvironment env = Mockito.mock(RegionCoprocessorEnvironment.class);
+        Configuration conf = new Configuration();
+        conf.set(HConstants.HBASE_CLIENT_OPERATION_TIMEOUT, String.valueOf(HConstants.DEFAULT_HBASE_CLIENT_OPERATION_TIMEOUT));
+        Mockito.when(context.getEnvironment()).thenReturn(env);
+        Mockito.when(env.getConfiguration()).thenReturn(conf);
+        ungroupObserver.preSplit(context, null);
+        ungroupObserver.postRollBackSplit(context);
+        Field fieldTag = ungroupClass.getDeclaredField("isRegionClosingOrSplitting");
+        fieldTag.setAccessible(true);
+        Boolean isRegionClosingOrSplitting = (Boolean) fieldTag.get(ungroupObserver);
+        assertEquals(isRegionClosingOrSplitting, false);
+    }
+}
+